CHLORINATED RUBBER BASED NONPOLLUTING COATING

Process for emulsification of chlorinated rubber and synthesis of graf t copolymer of chlorinated rubber and methacrylic acid have been descr ibed. Effect of monomer concentration (chlorinated rubber: methacrylic acid) used for grafting on emulsion stability has been discussed. Gra ft copolymer fraction is separated from homopolymer polymethacrylic ac id by soxhlet extraction in methanol and percentage of grafting and pe rcentage grafting efficiency have been calculated from dry weight and acid value data of the sample before and after extraction: Effect of i nitiator concentration on percentage of grafting and percentage grafti ng efficiency has been studied and explained in the light of the mecha nism of grafting. Graft copolymer has been characterised by Gel Permea tion Chromatography and IR spectra. The paint based on chlorinated rub ber emulsion is evaluated as a protective coating with special referen ce to its acid, alkali, water and humidity resistance.